The green treefrog
is one and a quarter to two and a quarter inches long and lives in the
swamps, lakes and streams of southern Illinois. It breeds from mid-May
to August in cypress swamps, floodplain sloughs and cattail marshes. These
frogs occasionally visit windows at night where they hunt for insects
attracted by light. A chorus of calling males sounds like the “chink”
of cowbells, while a single individual sounds like a nasal “quonk,
quonk, quonk.”